Liar, Deluded or Truthful? The Prophet Muhammad (peace be upon him) claimed prophet-hood over 1400 years ago. His message was simple: There is none worthy to be worshipped but God, and he (Prophet Muhammad) is the final messenger of God To test whether this claim is true we must rationally investigate the historical narratives and testimonies concerning the life of the Prophet (peace be upon him). Once we do this, we will be in a position to come to a balanced conclusion in this regard.